D is a systems programming language. Its focus is on combining the power and high performance of C and C++ with the programmer productivity of modern languages like Ruby and Python. The D language is statically typed and compiles directly to machine code. It's multiparadigm, supporting many programming styles: imperative, object oriented, and metaprogramming. It's a member of the C syntax family, and its appearance is very similar to that of C++.

LDC is a compiler for the D programming Language. It is based on the latest DMD frontend and uses LLVM as backend. LLVM provides a fast and modern backend for high quality code generation.

The Library

Druntime is the minimum library required to support the D programming
language. It includes the system code required to support the garbage
collector, associative arrays, exception handling, array vector operations,
startup/shutdown, etc.

Phobos: Each module in Phobos conforms as much as possible to the following design goals. These are goals rather than requirements because D is not a religion, it's a programming language, and it recognizes that sometimes the goals are contradictory and counterproductive in certain situations, and programmers have jobs that need to get done.

Tango is a cross-platform open-source software library, written in the D programming language for D programmers. It is structured as a cohesive and comprehensive library for general purpose usage, and is supported by a growing number of recognized D enthusiasts.
Availability of solid and extensive documentation represents a prime factor in library accessibility, and thus this project is as much about documentation production as it is about top-notch functionality.